US 4,469,311 AGranted

Motorized hand torch

AssigneeVictor Equipment Company

InventorDavid A. Laing

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Abstract

A semi-automatic, motorized hand torch, or gas cutting machine, that is capable of being freely operated with one hand and characterized by device head having a cutting torch tip, respective conduit means for supplying to the tip preheat oxygen, cutting oxygen and fuel gas, a drive cylinder journalled for rotation about the tip, a drive wheel engaging the peripherally outer cylindrical wall of the drive cylinder so as to be driven thereby and moveable longitudinally therealong so as allow adjustment in height of the tip, a motor and transmission drivingly connected with a drive cylinder, control for controlling the motor, housing and bracket for supporting the drive wheel adjacent the tip. Also disclosed are specific preferred embodiments including those in which respective small and large circle cutting attachments are employed and wherein an angled cutting wheel and strut are employed for cutting at an angle, as well as specific preferred structure.

Claims9

Dependent claims

A gas cutting machine for cutting steel plate or the like comprising:

a. a device head having a cutting torch tip;
b. respective conduit means for supplying to said tip, respectively, preheat oxygen, cutting oxygen and fuel gas;
c. a drive cylinder journalled for rotation about said head;
said drive cylinder having appreciable height so that a drive wheel can be moved upwardly and downwardly while engaging its peripherally outer cylinder wall;
d. a drive wheel engaging the peripherally outer cylindrical wall of said drive cylinder so as to be driven thereby and moveable longitudinally therealong so as to allow adjustment in height of said tip with respect to said steel plate to allow cutting at a desired angle;
e. a motor;
f. a power transmission means connected with said motor and drivingly connected with said drive cylinder so as to drive said cylinder responsive to said motor;
g. control means for controlling said motor;
h. bracket connected with said housing and supporting said drive wheel adjacent said tip;
said bracket being adapted to be affixed such that said drive wheel drives in a straight line;
and being adapted to be loose so as to rotate in a full 360.degree. circle about said tip.

8 more elements

Dependencies are inferred from the claim text.